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<div class="title">src/inputParser/FourLineInputParser.java</div>  </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="keyword">package </span>inputParser;
<a name="l00002"></a>00002 
<a name="l00003"></a>00003 <span class="keyword">import</span> java.io.BufferedReader;
<a name="l00004"></a>00004 <span class="keyword">import</span> java.io.FileReader;
<a name="l00005"></a>00005 <span class="keyword">import</span> java.io.IOException;
<a name="l00006"></a>00006 <span class="keyword">import</span> java.util.ArrayList;
<a name="l00007"></a>00007 <span class="keyword">import</span> java.util.LinkedList;
<a name="l00008"></a>00008 <span class="keyword">import</span> java.util.List;
<a name="l00009"></a>00009 <span class="keyword">import</span> contextFree.grammar.GrammarFactory;
<a name="l00010"></a>00010 <span class="keyword">import</span> contextFree.grammar.IGrammar;
<a name="l00011"></a>00011 <span class="keyword">import</span> contextFree.grammar.Production;
<a name="l00012"></a>00012 
<a name="l00013"></a>00013 
<a name="l00014"></a>00014 <span class="keyword">import</span> error.ERROR_TYPE;
<a name="l00015"></a>00015 <span class="keyword">import</span> error.ErrorManager;
<a name="l00016"></a>00016 
<a name="l00026"></a><a class="code" href="classinput_parser_1_1_four_line_input_parser.html">00026</a> <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="classinput_parser_1_1_four_line_input_parser.html" title="Parse a four line grammar format.">FourLineInputParser</a> <span class="keyword">extends</span> <a class="code" href="classinput_parser_1_1_abstract_input_parser.html">AbstractInputParser</a>{
<a name="l00027"></a>00027         String file;
<a name="l00028"></a>00028         String A_reader, V_reader, T_reader, P_reader;
<a name="l00029"></a>00029         String[] V_temp, T_temp, P_temp;
<a name="l00030"></a>00030         String[] singPro;
<a name="l00031"></a>00031         <span class="comment">// List&lt;Character&gt; esprTemp;</span>
<a name="l00032"></a>00032         <a class="code" href="classcontext_free_1_1grammar_1_1_production.html">Production</a> pro;
<a name="l00033"></a>00033         <span class="keywordtype">int</span> i, j;
<a name="l00034"></a>00034         List&lt;String&gt; V=null ,T = null;
<a name="l00035"></a>00035         List&lt;Production&gt; P=null;
<a name="l00036"></a>00036         
<a name="l00037"></a>00037         <span class="keyword">public</span> <a class="code" href="classinput_parser_1_1_four_line_input_parser.html" title="Parse a four line grammar format.">FourLineInputParser</a>(){
<a name="l00038"></a>00038                 file = null;
<a name="l00039"></a>00039         }
<a name="l00040"></a>00040         
<a name="l00041"></a>00041         <span class="keyword">public</span> <a class="code" href="classinput_parser_1_1_four_line_input_parser.html" title="Parse a four line grammar format.">FourLineInputParser</a>(String input){
<a name="l00042"></a>00042                 file = input;
<a name="l00043"></a>00043                 V=<span class="keyword">new</span> LinkedList&lt;String&gt;();
<a name="l00044"></a>00044                 T=<span class="keyword">new</span> ArrayList&lt;String&gt;();
<a name="l00045"></a>00045                 P=<span class="keyword">new</span> ArrayList&lt;Production&gt;();
<a name="l00046"></a>00046         }
<a name="l00047"></a>00047         
<a name="l00053"></a>00053         @Override
<a name="l00054"></a><a class="code" href="classinput_parser_1_1_four_line_input_parser.html#a99c37488d66cfeecb33e13d573b4a81a">00054</a>         <span class="keyword">public</span> <a class="code" href="interfacecontext_free_1_1grammar_1_1_i_grammar.html" title="Grammar Interface.">IGrammar</a> <a class="code" href="classinput_parser_1_1_four_line_input_parser.html#a99c37488d66cfeecb33e13d573b4a81a" title="Read the file .4l and creates the object grammar.">parse</a>() throws Exception{
<a name="l00055"></a>00055                 <span class="keywordflow">try</span> {
<a name="l00056"></a>00056                         BufferedReader f = <span class="keyword">new</span> BufferedReader(<span class="keyword">new</span> FileReader(file));
<a name="l00057"></a>00057                         <span class="comment">// abbiamo bisogno di due variabili temporali una dove andra&#39;</span>
<a name="l00058"></a>00058                         <span class="comment">// caricata la riga letta e un&#39;altra di tipo String[] dove</span>
<a name="l00059"></a>00059                         <span class="comment">// saranno caricati i singoli elementi</span>
<a name="l00060"></a>00060                         
<a name="l00061"></a>00061                                 A_reader = f.readLine(); <span class="comment">// simbolo assioma</span>
<a name="l00062"></a>00062                                 V_reader = f.readLine(); <span class="comment">// simboli nn terminali</span>
<a name="l00063"></a>00063                                 T_reader = f.readLine(); <span class="comment">// simboli terminali</span>
<a name="l00064"></a>00064                                 P_reader = f.readLine(); <span class="comment">// insieme produzioni</span>
<a name="l00065"></a>00065                                 f.close();
<a name="l00066"></a>00066                                 
<a name="l00067"></a>00067                         }<span class="keywordflow">catch</span>(IOException e){
<a name="l00068"></a>00068                                 <a class="code" href="classerror_1_1_error_manager.html">ErrorManager</a>.manage(<a class="code" href="enumerror_1_1_e_r_r_o_r___t_y_p_e.html">ERROR_TYPE</a>.INPUT_FILE,e);
<a name="l00069"></a>00069                                 <span class="keywordflow">return</span> null;
<a name="l00070"></a>00070                         }
<a name="l00071"></a>00071                 
<a name="l00072"></a>00072                         V_temp = V_reader.replaceAll(<span class="stringliteral">&quot; &quot;</span>,<span class="stringliteral">&quot;&quot;</span>).split(<span class="stringliteral">&quot;,&quot;</span>);
<a name="l00073"></a>00073                         T_temp = T_reader.replaceAll(<span class="stringliteral">&quot; &quot;</span>,<span class="stringliteral">&quot;&quot;</span>).split(<span class="stringliteral">&quot;,&quot;</span>);
<a name="l00074"></a>00074                         P_temp = P_reader.replaceAll(<span class="stringliteral">&quot; &quot;</span>,<span class="stringliteral">&quot;&quot;</span>).split(<span class="stringliteral">&quot;,&quot;</span>);
<a name="l00075"></a>00075                         
<a name="l00076"></a>00076                         <span class="keywordflow">try</span>{
<a name="l00077"></a>00077                                 <span class="comment">//inserisco innanzi tutto l&#39;assioma tra i non Termianli</span>
<a name="l00078"></a>00078                                 V.add(A_reader);
<a name="l00079"></a>00079                                 <span class="comment">// inserisco i Non Terminali nel List&lt;string&gt; V</span>
<a name="l00080"></a>00080                                 <span class="keywordflow">for</span> (i = 0; i &lt; V_temp.length; i++) {
<a name="l00081"></a>00081                                         <span class="comment">// controllo che non sia uguale al  simbolo dell&#39;assioma e lo inserisco</span>
<a name="l00082"></a>00082                                         <span class="keywordflow">if</span> (!A_reader.equals(V_temp[i]))
<a name="l00083"></a>00083                                                 V.add(V_temp[i]);
<a name="l00084"></a>00084                                 }       
<a name="l00085"></a>00085 
<a name="l00086"></a>00086                                         <span class="comment">// inserisco i terminali nel List&lt;string&gt; T</span>
<a name="l00087"></a>00087                                         <span class="keywordflow">for</span> (i = 0; i &lt; T_temp.length; i++) {
<a name="l00088"></a>00088                                                 
<a name="l00089"></a>00089                                                 T.add(T_temp[i]);
<a name="l00090"></a>00090                                         }
<a name="l00091"></a>00091                         
<a name="l00092"></a>00092                                 <span class="comment">// inserisco le produzioni nel List&lt;produzione&gt;</span>
<a name="l00093"></a>00093                                 <span class="keywordflow">for</span> (i = 0; i &lt; P_temp.length; i++) {
<a name="l00094"></a>00094                                         <span class="comment">// separo soggetto e espressione per ogni produzione</span>
<a name="l00095"></a>00095                                         singPro = P_temp[i].split(<span class="stringliteral">&quot;::=&quot;</span>);
<a name="l00096"></a>00096                                         <span class="comment">//e li inserisco in un oggetto di tipo Prodaction</span>
<a name="l00097"></a>00097                                         P.add(<span class="keyword">new</span> <a class="code" href="classcontext_free_1_1grammar_1_1_production.html">Production</a>(singPro[0], singPro[1],V,T));      
<a name="l00098"></a>00098                                 }
<a name="l00099"></a>00099                         } <span class="keywordflow">catch</span> (Exception e) {
<a name="l00100"></a>00100                                 <a class="code" href="classerror_1_1_error_manager.html">ErrorManager</a>.manage(<a class="code" href="enumerror_1_1_e_r_r_o_r___t_y_p_e.html">ERROR_TYPE</a>.INVALID_GRAMMAR, e);
<a name="l00101"></a>00101                         }
<a name="l00102"></a>00102                         
<a name="l00103"></a>00103 
<a name="l00104"></a>00104                         
<a name="l00105"></a>00105                         <span class="keywordflow">return</span> <a class="code" href="classcontext_free_1_1grammar_1_1_grammar_factory.html" title="An object factory that create a correct instance of grammar.">GrammarFactory</a>.<a class="code" href="classcontext_free_1_1grammar_1_1_grammar_factory.html#a25d4e5bf4a9a452efca5dd6518e16c25" title="Check the type of grammar (ex.">createGrammar</a>(A_reader, P, V, T);
<a name="l00106"></a>00106                 }           
<a name="l00107"></a>00107 }
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